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Mathematics
Problem
Let
a
,
b
,
c
a, b, c
a
,
b
,
c
be positive numbers, then the minimum value of
a
4
+
b
4
+
c
2
a
b
c
\frac{a^4 + b^4 + c^2}{abc}
ab
c
a
4
+
b
4
+
c
2
is : (a) 4 (b)
2
3
/
4
2^{3/4}
2
3/4
(c)
2
\sqrt{2}
2
(d)
2
2
2\sqrt{2}
2
2
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